| 基于席夫碱的四种Zn2+荧光探针的合成及其性能 |
| Synthesis and performance of four Zn2+ fluorescent probes based on Schiff bases |
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| 摘要: 以乙二胺与水杨醛及其衍生物为原料，构建了4种席夫碱Zn2+荧光探针，其结构均由1H NMR、13C NMR和IR进行了表征。光谱分析实验结果表明，相比于其他探针，探针L2对Zn2+具有更好的选择性和灵敏度，检出限为92.15 nmol·L-1。在0~30μmol·L-1的浓度范围内，探针L2的荧光强度与Zn2+浓度可呈良好的线性关系，在紫外灯下可用肉眼观察到明显颜色变化。通过Job曲线、核磁滴定实验、密度泛函理论计算和L2-Zn2+配合物单晶结构对识别机理进行了研究，结果表明探针L2与Zn2+以物质的量之比1∶1配位。此外，探针L2还可用于检测实际水样中的Zn2+。 |
| 关键词: 席夫碱 荧光探针 锌离子 识别机理 水样检测 |
| 基金项目: 湖南省自然科学基金(No.2021JJ30291)和湖南省教育厅科研项目(No.21A0518，21C0691)资助。 |
| Abstract: Four fluorescent probes for zinc ion based on Schiff bases were synthesized from ethylenediamine and salicylaldehyde derivatives and their structures were characterized by 1H NMR, 13C NMR, and IR. The spectral analysis results show that probe L2 has better selectivity and sensitivity to Zn2+ than other probes and the detection limit of probe L2 was 92.15 nmol·L-1. There was a good linear relationship between the fluorescence intensity of probe L2 and the concentration of Zn2+ in a range of 0 to 10 μmol·L-1. The visible fluorescence color change was observed with the naked eye under the ultraviolet lamp. The recognition mechanism was studied by Job's plot, NMR titration experiment, density functional theory calculation, and the crystal structure of the L2 - Zn2+ complex. The results showed that probe L2 was complexed with Zn2+ in a molar ratio of 1∶1. In addition, probe L2 could detect Zn2+ in actual water samples. |
| Keywords: Schiff base fluorescent probe zinc ion identification mechanism water sample detection |
| 投稿时间：2023-03-09 修订日期：2023-06-08 |
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| 何薇,龚兰,邓绍文,李中燕,袁霖.基于席夫碱的四种Zn2+荧光探针的合成及其性能[J].无机化学学报,2023,39(10):1914-1922. |
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